Theodore C Rich

US Patent:

6674947, Jan 6, 2004

Filed:

Feb 23, 2001

Appl. No.:

09/792423

Inventors:

Irfan Camlibel - Bedminster NJ
Jonathan Sherman - Caldwell ID
Theodore C. Rich - Basking Ridge NJ
Ernest J. Rich - Princeton NJ

Assignee:

Fiberguide Industries, Inc. - Stirling NJ

International Classification:

G02B 604

US Classification:

385115, 385120, 385 85

Abstract:

A system of making high density optical fiber arrays that includes securing the optical fiber ends in the housing front mask openings, then lapping the fiber ends and front mask forward surface to angle the fiber end front surfaces so that reflected wave energy does not interfere with optical signal data when transmitted during use. The opening pattern is preferably 2Ã2 to 128Ã128 or higher. Several alternate lap tool designs are disclosed including translational and rotating laps formed from solid bodies or a series of stacked plates. Standard slurry grinding and polishing compounds can be applied as desired. If a layer of epoxy originally covers the mask front face, it is removed by the lap tool as the fiber ends are lapped.

US Patent:

6704483, Mar 9, 2004

Filed:

Jun 7, 2002

Appl. No.:

10/164912

Inventors:

Jonathan Sherman - Caldwell ID
Irfan Camlibel - Bedminster NJ
Theodore C. Rich - Basking Ridge NJ
Ernest J. Rich - Princeton NJ

Assignee:

Fiberguide Industries, Inc. - Stirling NJ

International Classification:

G02B 604

US Classification:

385115, 385 52, 385 92, 385137

Abstract:

A high density optical fiber array assembly and assembly method includes a housing securing a front array mask etched with extreme precision to define openings arranged in a predetermined pattern. A series of guide plates form a series of fiber guide channels that align with the mask openings, which plates are stacked within the housing so that the bottom of one acts as a cover for the channels of another. Fibers can be tool inserted along the channels as one group, such as a row of fibers, or manually inserted and advanced sequentially. Alternately, the mask and guide plate stack are mounted to and within a mounting block and the mounting block assembly inserted into the assembly housing substantially all remaining voids in the housing are filled with bonding material.

US Patent:

6766086, Jul 20, 2004

Filed:

Mar 1, 2002

Appl. No.:

10/087455

Inventors:

Jonathan Sherman - Caldwell ID
Theodore C. Rich - Basking Ridge NJ
Irfan Camlibel - Bedminster NJ

Assignee:

Fiberguide Industries, Inc. - Stirling NJ

International Classification:

G02B 600

US Classification:

385 52, 385137, 385136

Abstract:

Optical fiber array apparatus comprising housing front mask having a matrix of fiber seating openings each opening having one or more side walls. An optical fiber extends through each opening and means presses the fiber side surface into engagement with the one or more side walls to precisely position and secure the fiber. Bonding material then fills all voids in and around the opeining. In one embodiment, a clamping wafer behind the front mask moves to clamp the fibers to the front mask opening walls. In another, the front mask defines flexing arms with distal ends that clamp fibers to opening walls and in yet another elongated flexible members lie along front mask slots to clamp fibers in openings that communicate into the slots.

US Patent:

41654960, Aug 21, 1979

Filed:

Dec 16, 1977

Appl. No.:

5/861288

Inventors:

Mauro Di Domenico - Bernardsville NJ
Michael A. Karr - New Providence NJ
Theodore C. Rich - Berkeley Heights NJ

Assignee:

Bell Telephone Laboratories, Incorporated - Murray Hill NJ

International Classification:

H01S 313
G02B 514

US Classification:

331 945S

Abstract:

An optical fiber tap is described which comprises a beamsplitter formed by positioning bevelled, parallel endfaces of two segments of optical fiber in coaxial alignment and in close proximity to each other. A suitable dielectric film, such as air, fills the gap between the endfaces. Light propagating into the tap from the first fiber segment is partially reflected and partially refracted at the bevelled endfaces. The refracted portion enters the second fiber segment and the reflected portion leaves the tap and is detected by a photodetector. By choice of the proper angle for the bevelled endfaces, the tap can be made substantially mode independent. A greater degree of mode independence can be obtained by interposing a steady-state mode exciter between the light source and the beamsplitter. The tap is particularly useful for semiconductor junction laser stabilization by the feedback arrangement described herein since the ratio of the intensity of the reflected portion to that of the refracted portion is substantially constant. A package assembly for use in the feedback arrangement is also described.

US Patent:

59076500, May 25, 1999

Filed:

Jun 26, 1997

Appl. No.:

8/883066

Inventors:

Jonathan Sherman - Caldwell ID
Irfan Camlibel - Oxford NJ
Ernest J. Rich - Princeton Junction NJ
Theodore C. Rich - Berkeley Heights NJ

Assignee:

Fiberguide Industries, Inc. - Stirling NJ

International Classification:

G02B 636

US Classification:

385 80

Abstract:

An optical fiber array connector in which the tolerance of the diameter of the mask openings are not factors in the overall positioning of the plurality of fibers. The array includes a mask element with rear and forward surfaces and a plurality of openings that communicate through these surfaces. A plurality of optical fibers include fiber ends having substantially truncated conical side surfaces that extend through the openings and engage the portions of the mask openings nearest the mask rear surface. A method includes preparing the fibers to form a conical surface at their distal ends, preparing the openings in the primary mask each with a diameter less than the diameter of the fiber cladding or second layer, inserting the conical fiber ends until the conical surfaces engage the mask opening walls, applying bonding material to the mask forward surface and exposed tips, grinding and polishing the exposed tips and bonding material surface to truncate the cones and expose the fiber core diameters.

US Patent:

59012641, May 4, 1999

Filed:

Jun 12, 1997

Appl. No.:

8/873818

Inventors:

Irfan Camlibel - Oxford NJ
David J. Voss - Howell NJ
Theodore C. Rich - Berkeley Heights NJ

Assignee:

Fiberguide Industries - Stirling NJ

International Classification:

G02B 602

US Classification:

385128

Abstract:

Solar resistant fused silica optical fiber is made by heating the starter rod, drawing the fiber, and preferably immediately diffusing hydrogen into the fiber, then promptly covering the hydrogen diffused fiber with hermetic coating to trap the hydrogen within the fiber. The presence of hydrogen in the fiber neutralizes UV radiation induced defects and because the hydrogen can only migrate through the fiber ends, the life of the solar resistant fiber for transmission wavelengths is increased by several years over conventional solar resistant fiber.

US Patent:

42524571, Feb 24, 1981

Filed:

Jun 27, 1978

Appl. No.:

5/919491

Inventors:

Walter W. Benson - Berkeley Heights NJ
Irfan Camlibel - Stirling NJ
Donald R. Mackenzie - Plainfield NJ
Theodore C. Rich - Berkeley Heights NJ

Assignee:

Bell Telephone Laboratories, Incorporated - Murray Hill NJ

International Classification:

C03B 2320
B25G 328

US Classification:

403284

Abstract:

A process for hermetically sealing an optical fiber to a metal housing is described. An optical fiber 12 is threaded through a thick-walled metal tube 10 which has a bore 11 of slightly larger diameter than the fiber. The tube and fiber are inserted in a pneumatically operated collet and uniform radial pressure is applied to the tube to form a unitary hermetic assembly. Metal tube 10 is characterized in that it has or, prior to forming the assembly, is annealed to have a Rockwell hardness of less that 15 T 15. At this value the metal is soft and the pressure required to cause the metal to cold flow around the fiber is less than that required to break the fiber. The tube is then soldered or otherwise secured in a hole in the housing, thus completing the hermetic seal. Such a seal is useful in hermetic packaging of optical devices. It is advantageous over the prior art for its simplicity and inexpensiveness.

US Patent:

41193636, Oct 10, 1978

Filed:

Mar 18, 1976

Appl. No.:

5/667961

Inventors:

Irfan Camlibel - Stirling NJ
Theodore Charles Rich - Branchburg NJ

Assignee:

Bell Telephone Laboratories Incorporated - Murray Hill NJ

International Classification:

G02B 514
H01L 3300

US Classification:

350 9620

Abstract:

An optical fiber is hermetically sealed to a metal housing containing an optical device (e. g, a semiconductor junction laser or photodiode) by threading and centering the fiber through a thin walled metal tube, filling the tube with solder (e. g. , a cylindrical preform) and allowing it to cool. The solder, upon solidifying and cooling, squeezes against the fiber and forms a hermetic seal. The tube-fiber assembly is inserted through an aperture in the housing wall, the fiber is aligned with the optical device and then the tube is soldered to the wall. The housing is out-gassed and then back-filled with a noncorrosive ambient such as nitrogen. Other aspects of the hermetic package, including a laser mount, are also described.